func smtpSendMailPart2(c *smtp.Client, smtpHost string, a smtp.Auth, from string, to []string, msg []byte) (err error) {
defer c.Close()
if err = c.Hello("localhost"); err != nil {
return err
}
if ok, _ := c.Extension("STARTTLS"); ok {
config := &tls.Config{ServerName: smtpHost}
if err = c.StartTLS(config); err != nil {
return err
}
}
if a != nil {
if ok, _ := c.Extension("AUTH"); ok {
if err = c.Auth(a); err != nil {
return err
}
}
}
if err = c.Mail(from); err != nil {
return err
}
for _, addr := range to {
if err = c.Rcpt(addr); err != nil {
return err
}
}
w, err := c.Data()
if err != nil {
return err
}
_, err = w.Write(msg)
if err != nil {
return err
}
err = w.Close()
if err != nil {
return err
}
return c.Quit()
}
func send(c *smtp.Client, m *mail.Message) error {
if err := c.Mail(config.Message_From); err != nil {
return fmt.Errorf("while setting From `%s`: %s", config.Message_From, err)
}
if config.ScanMessage {
for _, i := range []string{"To", "Cc", "Bcc"} {
if 0 == len(m.Header[i]) {
continue
}
if l, err := m.Header.AddressList(i); err != nil {
fmt.Fprintf(os.Stderr, "ScanMessage: Could not parse recipients in %s `%s`; %s", i, l, err)
} else {
for _, v := range l {
config.Message_To = append(config.Message_To, v.Address)
}
}
}
if 0 == len(config.Message_To) {
fmt.Fprintln(os.Stderr, "ScanMessage: No recipients found in message-body")
}
}
for _, to := range config.Message_To {
if err := c.Rcpt(to); err != nil {
return fmt.Errorf("while setting Recipient `%s`: %s", to, err)
}
}
w, err := c.Data()
if err != nil {
return fmt.Errorf("while setting Data: %s", err)
}
var s = ""
for k, h := range m.Header {
for _, v := range h {
s += k + ": " + v + "\r\n"
}
}
b := bytes.Buffer{}
b.ReadFrom(m.Body)
if _, err := w.Write([]byte(s + "\r\n" + b.String())); err != nil {
return fmt.Errorf("while sending message: %s", err)
}
if err = w.Close(); err != nil {
return fmt.Errorf("while closing message: %s", err)
}
if err = c.Quit(); err != nil {
return fmt.Errorf("while closing connection: %s", err)
}
return nil
}
func sendMail(c *conf.ConfigFile, e Envelope) error {
var addr string
var err error
var conn *smtp.Client
addr, _ = c.GetString("main", "smtp")
conn, err = smtp.Dial(addr)
if err != nil {
return err
}
if err = conn.Mail(e.Sender); err != nil {
return err
}
for _, addr := range e.Recipients {
if err = conn.Rcpt(addr); err != nil {
return err
}
}
w, err := conn.Data()
if err != nil {
return err
}
io.Copy(w, serializeMail(e))
conn.Quit()
return nil
}
func SendEmail(address string, from string, toArray []string, subject string, message []byte) (string, *gkerr.GkErrDef) {
var err error
var conn *smtp.Client
var dataWriter io.WriteCloser
var gkErr *gkerr.GkErrDef
var sendId string
conn, err = smtp.Dial(address)
if err != nil {
gkErr = gkerr.GenGkErr("smtp.Dial", err, ERROR_ID_SMTP_DIAL)
return "", gkErr
}
conn.Mail(from)
for _, adr := range toArray {
conn.Rcpt(adr)
}
dataWriter, err = conn.Data()
if err != nil {
gkErr = gkerr.GenGkErr("conn.Data", err, ERROR_ID_SMTP_DATA)
return "", gkErr
}
defer dataWriter.Close()
buf := bytes.NewBufferString("From: " + from + "\nTo: " + toArray[0] + "\nSubject: " + subject + "\n")
_, err = buf.WriteTo(dataWriter)
if err != nil {
gkErr = gkerr.GenGkErr("buf.WriteTo", err, ERROR_ID_SMTP_WRITE)
return "", gkErr
}
buf = bytes.NewBufferString(string(message))
_, err = buf.WriteTo(dataWriter)
if err != nil {
gkErr = gkerr.GenGkErr("buf.WriteTo", err, ERROR_ID_SMTP_WRITE)
return "", gkErr
}
err = conn.Quit()
if err != nil {
localError := fmt.Sprintf("%v", err)
if strings.Index(localError, "Ok") != -1 &&
strings.Index(localError, "queued as") != -1 {
sendId = localError
} else {
gkErr = gkerr.GenGkErr("conn.Quit", err, ERROR_ID_SMTP_QUIT)
//gklog.LogTrace(fmt.Sprintf("smtp quit %T [%v] %v",err, err, gkErr))
return "", gkErr
}
}
return sendId, nil
}
func SendMail(to []string, subject, body string) (err error) {
if addr == "" {
// skip if not configured
return nil
}
// create client
var conn net.Conn
var client *smtp.Client
if conn, err = net.Dial("tcp", addr+":25"); err != nil {
return logError(err, to, subject, body)
}
if client, err = smtp.NewClient(conn, ""); err != nil {
return logError(err, to, subject, body)
}
defer client.Quit()
msg := fmt.Sprintf("From: %s\n", from)
if err = client.Mail(from); err != nil {
return logError(err, to, subject, body)
}
for _, addr := range to {
msg += fmt.Sprintf("To: %s\n", addr)
if err = client.Rcpt(addr); err != nil {
return logError(err, to, subject, body)
}
}
for _, addr := range cc {
msg += fmt.Sprintf("Cc: %s\n", addr)
if err = client.Rcpt(addr); err != nil {
return logError(err, to, subject, body)
}
}
msg += fmt.Sprintf("Date: %s\n", time.Now().String())
msg += fmt.Sprintf("Subject: %s\n\n", subject)
msg += body
w, err := client.Data()
if err != nil {
return logError(err, to, subject, body)
}
fmt.Fprintf(w, msg)
w.Close()
log.Printf("[SMTP] SENT: %v '%s'", to, subject)
return nil
}
// send does the low level sending of the email
func send(host string, port string, from string, to []string, msg string, auth smtp.Auth, encryption encryption, config *tls.Config, connectTimeout int) error {
var smtpConnectChannel chan smtpConnectErrorChannel
var c *smtp.Client = nil
var err error
// set the timeout value
timeout := time.Duration(connectTimeout) * time.Second
// if there is a timeout, setup the channel and do the connect under a goroutine
if timeout != 0 {
smtpConnectChannel = make(chan smtpConnectErrorChannel, 2)
go func() {
c, err = smtpConnect(host, port, from, to, msg, auth, encryption, config)
// send the result
smtpConnectChannel <- smtpConnectErrorChannel{
client: c,
err: err,
}
}()
}
if timeout == 0 {
// no timeout, just fire the connect
c, err = smtpConnect(host, port, from, to, msg, auth, encryption, config)
} else {
// get the connect result or timeout result, which ever happens first
select {
case result := <-smtpConnectChannel:
c = result.client
err = result.err
case <-time.After(timeout):
return errors.New("Mail Error: SMTP Connection timed out")
}
}
// check for connect error
if err != nil {
return err
}
defer c.Close()
// Set the sender
if err := c.Mail(from); err != nil {
return err
}
// Set the recipients
for _, address := range to {
if err := c.Rcpt(address); err != nil {
return err
}
}
// Send the data command
w, err := c.Data()
if err != nil {
return err
}
// write the message
_, err = fmt.Fprint(w, msg)
if err != nil {
return err
}
err = w.Close()
if err != nil {
return err
}
return c.Quit()
}
func sendEmail(templ, subject, username, toUser, tokenVerify, text, cmd, device string) error {
t := template.New("Email template")
t, err := t.Parse(templ)
if err != nil {
log.Errorf("Error with parsing template:%s ", err.Error())
return err
}
paramEmail := ¶mEmail{
TextVerify: text,
CMDVerify: cmd,
}
var b bytes.Buffer
err = t.Execute(&b, paramEmail)
if err != nil {
log.Errorf("Error with Execute template:%s ", err.Error())
return err
}
if viper.GetBool("no_smtp") {
fmt.Println("##### NO SMTP DISPLAY MAIL IN CONSOLE ######")
fmt.Printf("Subject:%s\n", subject)
fmt.Printf("Text:%s\n", b.Bytes())
fmt.Println("##### END MAIL ######")
return nil
}
from := mail.Address{
Name: "",
Address: viper.GetString("smtp_from"),
}
to := mail.Address{
Name: "",
Address: toUser,
}
// Setup headers
headers := make(map[string]string)
headers["From"] = viper.GetString("smtp_from")
headers["To"] = to.String()
headers["Subject"] = subject
// Setup message
message := ""
for k, v := range headers {
message += fmt.Sprintf("%s: %s\r\n", k, v)
}
message += "\r\n" + b.String()
// Connect to the SMTP Server
servername := fmt.Sprintf("%s:%s", viper.GetString("smtp_host"), viper.GetString("smtp_port"))
// TLS config
tlsconfig := &tls.Config{
InsecureSkipVerify: true,
ServerName: viper.GetString("smtp_host"),
}
var c *smtp.Client
if viper.GetBool("smtp_tls") {
// Here is the key, you need to call tls.Dial instead of smtp.Dial
// for smtp servers running on 465 that require an ssl connection
// from the very beginning (no starttls)
conn, errc := tls.Dial("tcp", servername, tlsconfig)
if errc != nil {
log.Errorf("Error with c.Dial:%s", errc.Error())
return err
}
c, err = smtp.NewClient(conn, viper.GetString("smtp_host"))
if err != nil {
log.Errorf("Error with c.NewClient:%s", err.Error())
return err
}
} else {
c, err = smtp.Dial(servername)
if err != nil {
log.Errorf("Error while smtp.Dial:%s", err)
}
defer c.Close()
}
// Auth
if viper.GetString("smtp_user") != "" && viper.GetString("smtp_password") != "" {
auth := smtp.PlainAuth("", viper.GetString("smtp_user"), viper.GetString("smtp_password"), viper.GetString("smtp_host"))
if err = c.Auth(auth); err != nil {
log.Errorf("Error with c.Auth:%s", err.Error())
return err
}
}
// To && From
if err = c.Mail(from.Address); err != nil {
log.Errorf("Error with c.Mail:%s", err.Error())
return err
}
if err = c.Rcpt(to.Address); err != nil {
log.Errorf("Error with c.Rcpt:%s", err.Error())
return err
}
// Data
w, err := c.Data()
if err != nil {
log.Errorf("Error with c.Data:%s", err.Error())
return err
}
_, err = w.Write([]byte(message))
if err != nil {
log.Errorf("Error with c.Write:%s", err.Error())
return err
}
err = w.Close()
if err != nil {
log.Errorf("Error with c.Close:%s", err.Error())
return err
}
c.Quit()
return nil
}
// SendMailMessage handles outgoing message to SMTP server.
//
// - The connections to the service can be either plain (port 25)
// or SSL/TLS (port 465)
//
// - If the server supports STARTTLS and the channel is not already
// encrypted (via SSL), the application will use the "STLS" command
// to initiate a channel encryption.
//
// - Connections can be tunneled through any SOCKS5 proxy (like Tor)
func SendMailMessage(host, proxy, fromAddr, toAddr string, body []byte) error {
var (
c0 net.Conn
c1 *tls.Conn
cli *smtp.Client
)
defer func() {
if cli != nil {
cli.Close()
}
if c1 != nil {
c1.Close()
}
if c0 != nil {
c0.Close()
}
}()
uSrv, err := url.Parse(host)
if err != nil {
return err
}
if proxy == "" {
c0, err = net.Dial("tcp", uSrv.Host)
} else {
host, port, err := SplitHost(uSrv.Host)
if err != nil {
return err
}
c0, err = Socks5Connect("tcp", host, port, proxy)
}
if err != nil {
return err
}
if c0 == nil {
return errors.New("Can't estabish connection to " + uSrv.Host)
}
sslConfig := &tls.Config{InsecureSkipVerify: true}
if uSrv.Scheme == "smtps" {
c1 = tls.Client(c0, sslConfig)
if err = c1.Handshake(); err != nil {
return err
}
cli, err = smtp.NewClient(c1, uSrv.Host)
} else {
cli, err = smtp.NewClient(c0, uSrv.Host)
if err == nil {
if ok, _ := cli.Extension("STLS"); ok {
err = cli.StartTLS(sslConfig)
}
}
}
if err != nil {
return err
}
pw, _ := uSrv.User.Password()
auth := smtp.PlainAuth("", uSrv.User.Username(), pw, uSrv.Host)
if err = cli.Auth(auth); err != nil {
return err
}
if err = cli.Mail(fromAddr); err != nil {
return err
}
if err = cli.Rcpt(toAddr); err != nil {
return err
}
wrt, err := cli.Data()
if err != nil {
return err
}
wrt.Write(body)
wrt.Close()
if err = cli.Quit(); err != nil {
return err
}
return nil
}
func SendMail(timeout time.Duration, addr string, from string, to string, msg []byte) error {
response := make(chan error, 1)
var conn *smtp.Client
var err error
go func() {
conn, err = smtp.Dial(addr)
if err != nil {
response <- err
return
}
response <- nil
}()
select {
case res := <-response:
if res == nil {
go func() {
defer conn.Close()
if err = conn.Hello("localhost"); err != nil {
response <- err
return
}
if ok, _ := conn.Extension("STARTTLS"); ok {
config := &tls.Config{ServerName: addr}
if err = conn.StartTLS(config); err != nil {
response <- err
return
}
}
if err = conn.Mail(from); err != nil {
response <- err
return
}
if err = conn.Rcpt(to); err != nil {
response <- err
return
}
w, err := conn.Data()
if err != nil {
response <- err
return
}
_, err = w.Write(msg)
if err != nil {
response <- err
return
}
err = w.Close()
if err != nil {
response <- err
return
}
response <- conn.Quit()
}()
return <-response
} else {
return res
}
case <-time.After(time.Second * timeout): //don't do the smtp transaction, abandon the socket, it'll timeout after ~3 mins in syn_sent
return fmt.Errorf("Sending timeout")
}
}
// Send an email using the given host, SMTP auth (optional) and HELO hostname, returns any error thrown by smtp.SendMail
// This function merges the To, Cc, and Bcc fields and calls the smtp.SendMail function using the Email.Bytes() output as the message
func (e *Email) SendWithHELO(hostname string, port int32, a smtp.Auth, heloHostname string, esCerts *configprofile.CodeSigningCerts) error {
// format server address
addr := fmt.Sprintf("%s:%d", hostname, port)
// Merge the To, Cc, and Bcc fields
to := make([]string, 0, len(e.To)+len(e.Cc)+len(e.Bcc))
to = append(append(append(to, e.To...), e.Cc...), e.Bcc...)
for i := 0; i < len(to); i++ {
addr, err := mail.ParseAddress(to[i])
if err != nil {
return err
}
to[i] = addr.Address
}
// Check to make sure there is at least one recipient and one "From" address
if e.From == "" || len(to) == 0 {
return errors.New("Must specify at least one From address and one To address")
}
from, err := mail.ParseAddress(e.From)
if err != nil {
return err
}
// Sign the email with S/MIME
cmd := exec.Command("openssl", "smime", "-sign", "-signer", esCerts.Cert, "-inkey", esCerts.Key)
emailBytes, err := e.Bytes()
if err != nil {
return err
}
stdin, err := cmd.StdinPipe()
if err != nil {
return err
}
stdout, err := cmd.StdoutPipe()
if err != nil {
return err
}
err = cmd.Start()
if err != nil {
return err
}
stdin.Write(emailBytes)
stdin.Close()
signedData, err := ioutil.ReadAll(stdout)
if err != nil {
return err
}
err = cmd.Wait()
if err != nil {
return err
}
var signedEmail bytes.Buffer
headerToBytes(&signedEmail, e.msgHeaders())
signedEmail.Write(signedData)
raw := signedEmail.Bytes()
// Manually send email using net/smtp
var c *smtp.Client
if port == 465 {
// TLS config
tlsconfig := &tls.Config{
InsecureSkipVerify: true,
ServerName: hostname,
}
// Here is the key, you need to call tls.Dial instead of smtp.Dial
// for smtp servers running on 465 that require an ssl connection
// from the very beginning (no starttls)
conn, err := tls.Dial("tcp", addr, tlsconfig)
if err != nil {
return err
}
c, err = smtp.NewClient(conn, hostname)
if err != nil {
return err
}
} else {
c, err = smtp.Dial(addr)
if err != nil {
return err
}
}
defer c.Close()
if err = c.Hello(heloHostname); err != nil {
return err
}
if ok, _ := c.Extension("STARTTLS"); ok {
config := &tls.Config{ServerName: hostname}
if err = c.StartTLS(config); err != nil {
return err
}
}
if a != nil {
if ok, _ := c.Extension("AUTH"); ok {
if err = c.Auth(a); err != nil {
return err
}
}
}
if err = c.Mail(from.Address); err != nil {
return err
}
for _, addr := range to {
if err = c.Rcpt(addr); err != nil {
return err
}
}
w, err := c.Data()
if err != nil {
return err
}
_, err = w.Write(raw)
if err != nil {
return err
}
err = w.Close()
if err != nil {
return err
}
return c.Quit()
}